呈实性，肿瘤内同时具有成釉细胞瘤、影细胞和牙本质样结构，呈浸

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问题单项选择题

呈实性，肿瘤内同时具有成釉细胞瘤、影细胞和牙本质样结构，呈浸润性生长，术后易复发

A．牙源性钙化囊肿囊性型
B．角化成釉细胞瘤
C．牙源性钙化上皮瘤
D．牙源性影细胞瘤
E．牙源性影细胞癌

答案

参考答案：D

完形填空

短文填词（共10小题;每小题1分,满分10分）

Every individual is a member of a group called the community, and it

is the duty of every citizen _____ ask what he can do for his community.

小题1:_____

A good citizen _____(相信) that he should serve the community

小题2:_____

and not the community serve h_____. As students, there are many ways

小题3:_____

in _____ you can serve the community. Above all, however, you have to

小题4:_____

acquire a certain amount of skill and experience b_____ you can be of

小题5:_____

service to others. Your school has lots of_____(活动) which prepare

小题6:_____

you ____ good citizenship. Many school societies train students to

小题7:_____

become good citizens who later p____ in volunteer work and serve the

小题8:_____

public in t____ of need. If you serve your community, you will grow

小题9:_____

____ to be a good citizen with a strong sense of responsibility.

小题10:_____

单项选择题

直流输电的回流电路有（）。

A.架空线路；

B.电缆线路；

C.架空和电缆混合线路；

D.金属回路和大地或海水回路。